Rotary buffing tool



y 1945- E. w. HALL ET AL 5 ROTARY BUFFING TOOL Filed Feb. 1, 1941 2 Sheets-Sheet 1 r 0 mum/11111111011141? I L Inveniora: 1577562 141 WHaZZ;

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y 4 E. w. HALL ET AL I 2,376,053

ROTARY BUFFING TOOL Filed Feb. 1, 1941 '2 Sheets-Sheet 2 from. the right-hand side of Fig. 'l';

Patented May 15, 1945 Elisha Hall, Scituate, and A-l bin S; Rock, Rockland, Mass; assignorsto F. L. & J. C. Codman Company, Rockland, Mass., a

ltIassachusetts corporation of Application February 1, 1941, Serial No. 377,062

13 Claims. (01. 51-193) I I Fig. 9' is an elevation illustrating the fdl'dingof This invention relates to rotary abrading tools of the class employing a ring of abrading material aboutfland-secured' to a hub, and to be associated with other like assemblies coaxially disposed on and about an arbor and secured to the latter by clampingcplates and a clamping nut threaded onto the arbor. The inventionaims to overcome some of the disadvantages of-prio'r tools of this class, and among its aims are (l) to simplify the construction by the elimination of cerabrading element toand its removal from the hub rapid and convenient,. and 6) to increase the durability of the abrading element. Other aims and advantages will appear during the course of the following description or will be obvious to those skilled in the art. I

The invention will best-be understood by reference to the followingwdesoription when taken inconnection with the accompanying drawings of one. specific embodiment thereof, while: its scope will be pointed outmore particularly in the appended claims.

In the drawings: I

Fig. 1 is an elevation of anassembly of a hub' and a circumferential.'abrading element to beassociatedwith other like assemblies on'an arbor; -Fig. 2 is an elevation of'the assembly asviewed Fig. 3 is a sectional view on line 3'--,-3 of Fig. 2;

. Fig. 45 is a plan of' the assembly with the fold" of the abrading element opened to display the means of attachment of the abrading element to the hub; e I

Fig. 5 is an elevation illustrating the mode of spirally winding abias-cut strip of cloth to start the making of the abrading element;

Fig. 6 is an elevation viewed from the right- -hand side of Fig. 5;

Fig. 7 is a plan on an enlarged scale of a portion of the spirally-wound, bias-cut stripshowthe ring; and

Fig. 10 is a plan illustrating the step of attaching the ring to the hub.

Referring to the drawings and to the embodiment of the invention illustrated therein by way tain parts heretoforeemployed, (2) to reduce the I necks 28 of the T-shaped lugs 26'. Theseslots are of example, there is shown in Figs. 5 and 6 a biascut strip l2 of cloth being woundspirally on and about a drum l4 to the required thickness, after which the laminated cloth ring is removed axially. ,To attain suflicient thickness, it will be desirable to make, the strip of a number of bias-cut pieces joinedend to end by diagonal stitching l6 shown inFig'. '7. After winding, the convolutions are suitable secured together as by two rows of stitchin Hlextending through the several thicknesses and disposed lengthwise of the strip.

' The strip is now in the form of a cylindrical,

laminated ring 20' which is to be disposed circumferentiallyabout and secured to a simple-onepiece hub which is in the nature of a plate 22 This plate 22" is provided with a circumferential series of generally radial, T-shaped lugs 26,. each of which comprises a'neck 28'. and a circum ferentially elongated head 39 having two'oppositely extending projections 32. The .abradingv ring 20 is interlocked with the lugs 2-6 as by being provided with a series of slots 3 1 which receive the sufiiciently long to'admit of the passage ofthe heads therethrough when the slots are registered with the heads, by passing first one and then the other of the projections 32 through: the slot (see Fig. 10) after which the slot is turned out of,

registration with the headso as to occupy a position oblique thereto (see Fig. 4). Thus, the ring and the hub are securely interlocked-by relative movement of the slots about generally radial axes of the necks. As' shown, increased durability of v the edges of the slots 34 is attained by buttonhole" stitching 36 about the slots.

I The ring 20 is now folded (see Fig. 3), and to avoid undue bulkiness at the fold, the ring is provided with a centrally disposed row of openings 38 (see Figs. 8 and 9). The ring, when thus applied to the hub and folded circumferentially forms radial pleats or folds 40 (see Fig. 1) which overlap adjacent areas, and the ring is now sufiiciently compact so that the assembly can be combined with other like assemblies face to face on' and about an arbor in the usual fashion. When the ring has become worn sufiiciently to require replacement, the ring can be removed quickly and conveniently by a reversal of the foregoing operation, and replaced by another ring.

Having thus described one embodiment of our invention, what we claim and desire, by Letters Patent, to secure is:

1. A rotary abrading tool comprising, in combination, a hub, and an elongated strip of abrading material wound ciroumferentially to form a ring about said hub, said ring having a series of slots and said hub having a series of parts interlocked with slots and detachable therefrom by relative movement of said slots and said parts about generally radial axes.

2. A rotary abrading tool comprising, in combination, a hub provided with a circumferential series of projections, and a continuous strip circumferentially disposed, and constituting an uninterrupted abrading band about said hub and provided with a series of openings interlocked with said projections.

3. A rotary abrading tool comprising, in combination, a hub having a circumferential series of T-shaped, radial projections each having a neck and a head, and a continuous, unbroken strip circumferentially disposed, and constituting an uninterrupted abrading band having a series of slots about said necks, respectively and disposed obliquely with relation to said heads.

4. A rotary abrading tool comprising, in combination, a hub having a circumferential series of projections, and a continuous strip circumferentially disposed, and constituting an uninterrupted abrading band about said hub and interlocked with said projections, said band being foldedcircumferentially to provide an uninterrupted annular fold and said projections entering into the fold.

5. A rotary abrading tool comprising, in combination, a hub having a circumferential series of projections, and a continuous strip circumferentially disposed, and constituting an uninterrupted abrading band about said hub and provided with a series of slots interlocked with said projections, said band being folded circumferentially to provide an uninterrupted annular fold. and said projections entering into the fold, said band being provided with a series of apertures reducing its bulk along the fold and between said projections.

6. A rotary abrading tool comprising, in combination, a circumferentially folded and radially pleated, bias-cut, continuous strip of cloth constituting an uninterrupted abrading ring provided with a series of openings in its fold, and a hub provided with a series of projections received partly in said openings, and partly in said fold respectively, and securing said ring to said hub.

7. A rotary abrading tool comprising, in combination, a circumferentially folded and radially pleated, bias-cut, continuous strip of cloth constituting an uninterrupted abrading ring provided with a series of openings in its fold, and a hub provided with a series of projections comprising necks received in said openings and heads received within the fold and retaining said ring in place on said hub.

8. A rotary abrading tool comprising, in combination, a hub, and a bias-cut strip of cloth wound spirally about and continually receding from the axis of said hub and formin a laminated ring disposed about said hub and having an annular fold adjacent to said hub, said ring having passages extending radially through said laminations and means extending from said hub radially through said passages and into the interior of said fold to secure said ring to said hub.

9. A rotary abrading tool comprising, in combination, a hub, and a continuous stri of abrading materal constituting an uninterrupted band Wound spirally about and continually receding from the axis of said hub, thus presenting a laminated ring, the laminations being provided with a series of sets of registering openings forming passages radially through said ring, said hub being provided with a series of projections extending radially outward through said passages.

10. As a new article of manufacture an abrading element for a rotary abrading tool, the same consisting of a strip of cloth wound spirally about and continually receding from a center and forming a laminated ring having slots extending radially through the laminations.

11. As a new article of manufacture an abrading element for a rotary abrading tool, the same consisting of a strip of cloth wound spirally about and continually receding from a center and forming a laminated ring having slots extending radially through the laminations, said slots :being disposed at an angle to the longitudinal edges of said strip.

12. As a new article of manufacture an abrading element for a rotary abrading tool, the same consisting of a strip of cloth wound spirally about and continually receding from a center and forming a laminated ring having slots extending radially through the laminations, said slots being obliquely disposed with reference to the longitudinal edges of said strip.

13. As a new article of manufacture an abrading element for a rotary abrading tool, the same consisting of a strip of cloth wound, spirally about and continually receding from a center and forming a laminated ring having slots extending radially through the laminations, said laminations being secured together by at least one row of stitching extending through the several thicknesses and disposed lengthwise of said strip.

ELISHA W. HALL. ALBIN S. BOOK. 

